Sheet-driving mechanism



J. LENGYEL AND H. DOLL. SHEET DRIVING MECHANISM. APPLICATION FILED MAR, 23. 1911.

Patented Feb. 1, 1921.

UNITED STATES JOHN LENG YE L AND HENRY DOLL, OF NEW YORK, N. Y.

SHEET-DRIVING MECHANISM.

Specification of Letters Patent.

Patented Feb. 1, 1921.

. Application filed March 23, 1917. Serial No. 156,994.

T 0 all whom it may concern:

Be it known that we, JOHN LENGYEL and HENRY DOLL, a subject of the Emperor of Austria and a citizen of the United States, respectively, residing at boron h of Bronx, in the county of Bronx and tate of New York, have invented certain new and useful Improvements in Sheet-Driving Mechanism, of which the following is a specification, reference being had therein to the accompanying drawing.

Our invention relates to sheet driving mechanism, and more particularly has reference to and is shown in the accompanying drawings in its application to the sheet driving mechanism of a player piano.

Figure 1 illustrates in perspective partly broken away parts of the sheet driving mechanism of a player piano, showing an application of our invention. Fig. 2 is a detail of part of the brake mechanism also forming part of our invention.

3 indicates one of the side walls of the roll box within which is mounted in the usual manner the music spool i and takeup spool 5 upon the shafts 6 and 7 respectively, the take-up spool 5 or its shaft 7 being provided with the usual gear 8. 9 indicates the usual driving pinion upon the shaft 10 to which is also secured the clutch 11, pulley 12 and sprocket 13. Upon the music spool shaft 6 is also secured the usual sprocket 14 driven from the sprocket or pulley 12 by the chain 13 as usual.

15 indicates the usual finger lever at the front of the keyboard for throwing right or left, for winding or rewinding as the case may be and is secured upon the shaft 16 mounted in a bracket such as 17 or other suitable bearing, and provided with the lever 18 at the opposite end having pivotally connected at its opposite end the rod 19 which in turn is pivotally connected to the crank 20 having secured thereto the lever 21 connected by the wire or rod 22 pivotally to the lever 23 which in turn is pivotally mounted at 24.- upon the bracket 25 and has pivotally connected at its opposite extremity the rod 26 pivotally connected at its opposite end to the adjacent ends of the rods 27 and 28 pivoted respectively at 29 and 30 as shown. 31 indicates an arm or tongue suitably secured adjacent the ends of the levers 26, 27 and 28 to engage the clutch 11 so as to throw the same rightwardly or leftwardly looking at Fig. 1, and this clutch being secured to the shaft 10 causes the pinion 9 to disengage or engage the gear 8 accordingly and at the same time causes the pin 32 of said clutch to engage or disengage the pin 33 from the side of the sprocket 12 accordingly.

While playing, the shaft 10 rotates clockwise looking from right to left thereat so that when the clutch 11 is in its leftward position, the pinion 9 engages the gear 8 thereby winding the music web 34 upon the spool 5 leaving the sprocket 12 free so that the shaft 10 revolves therein. When the clutch 11 is thrown rightwardly the pinion 9 is disengaged from the gear 8 and the pin 32 of the clutch 11 engages the pin 33 of the sprocket 12 thereby causing the same to rotate clockwise looking from right to left, and likewise the sprocket 14; and shaft, causing the sheet to rewind upon the music spool 4. At the same time the lever 23 being thrown rightwardly releases the button 35 upon the end of the crank 36 at the oposite extremity of which is the friction utton 37 which is normally retained upon the side of the gear 8 by the spring 38 secured at one end at 39 upon the bracket 40, and at the opposite end to the crank 36 at- 41 as shown to better advantage in Fig. 2. Thus it will be seen that during the rewinding operation, the spring 38 being released by releasing the button 35 causes the friction button 37 to bear against the surface of the gear 8 thereby sufiiciently retarding the unwinding of the same to apply the proper tension to the music sheet 34 to insure neat and compact rewinding of the same upon the spool 4:.

From the foregoing it will be seen that when the lever 15 is thrown rightwardly as shown in Fig. 1, the lower end of the lever 18 is thrown leftwardly and also the lower end of the crank 20 thereby shifting the lower end of the lever 23 leftwardly, and likewise the rods 27-28 causing the pinion 9 to engage the gear 8 and releasing the friction button 37 on the side of said gear. When the lever 15 is thrown leftwardly for the rewinding operation, the lower end of: the lever 18 is thrown rightwardly, likewise the lower end of the crank 20 and the other parts are also moved oppositely, thus disconnecting the pinion 9 and gear 8 and establishing the rewinding operation, while at the same time releasing the button 10 and ap lying friction as aforesaid.

f course it will be understood that variated by one of said levers between its ends so as to engage and retard the driving gear of said spool.

In testimony whereof we hereunto aflix our signatures in the presence of two witnesses.

JOHN LENGYEL. HENRY DOLL.

Witnesses:

ETHEL GARDNER, THOMAS A. HILL. 

